- Currently treated with an atypical antipsychotic medication (EXCEPT for the Obese or Overweight Healthy Control Group, none of whom can be treated with any psychotropic medications Participants treated with any psychotropic medication may not have any medication changes for 1 month prior to study enrollment at the discretion of the PI, and Antipsychotic-Treated Participants must be treated with an antipsychotic > approximately 12 weeks with no antipsychotic medication dose changes for 1 month